Rhodobacter alkalitolerans sp. nov., isolated from an alkaline brown pond

Archives of Microbiology
Suresh GandhamVenkata Ramana Chintalapati

Abstract

An alkali-tolerant, Gram-stain-negative, motile, rod-to-oval-shaped, yellowish brown-colored, phototrophic bacterium, designated as strain JA916T, was isolated from an alkaline brown pond in Gujarat, India. The DNA G + C content of the strain JA916T was 65.1 mol%. Strain JA916T grew well at pH 10. Respiratory quinone was Q-10 and major fatty acid was C18:1ω7c/C18:1ω6c, with significant quantities of C15:02OH observed. Strain JA916T shared the highest 16S rRNA gene sequence similarity with the type strains of Rhodobacter johrii (98.4%), followed by Rhodobacter megalophilus (98.3%), Rhodobacter sphaeroides (98.3%), Rhodobacter azotoformans (97.9%) and other members of the genus Rhodobacter (< 97%). 16S rRNA gene-based phylogenetic tree shows that strain JA916T formed a distinct sub-clade with Rhodobacter johrii, Rhodobacter megalophilus, Rhodobacter sphaeroides and Rhodobacter azotoformans. Further, rpoB-based phylogenetic analysis showed lower similarity with closely related species (≤ 93.0%) of the genus Rhodobacter, which suggests that JA916T is a novel species of the genus Rhodobacter. DNA-DNA hybridization values between strain JA916T and related type strains were less than 40%. Phenotypic, chemotaxonomical and phylogenetic ...Continue Reading

References

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Citations

May 9, 2019·International Journal of Systematic and Evolutionary Microbiology·Aharon Oren, George M Garrity
Dec 21, 2019·International Journal of Systematic and Evolutionary Microbiology·Wen-Dong XianWen-Jun Li
Dec 6, 2019·International Journal of Systematic and Evolutionary Microbiology·Suresh GRamana Ch V
Jan 9, 2020·International Journal of Systematic and Evolutionary Microbiology·Anusha RaiRamana Ch V
Oct 29, 2020·International Journal of Systematic and Evolutionary Microbiology·Ceshing SheuWen-Ming Chen
Feb 1, 2022·International Journal of Systematic and Evolutionary Microbiology·Sára SzuróczkiErika Tóth

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Methods Mentioned

BETA
scanning electron microscopy
transmission electron microscopy
PCR

Software Mentioned

EzBioCloud
MEGA
BLAST
MEGA6

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